An Update for Architects

Transcription

1 An Update for Architects This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of distribution or dealing in any material or product. Questions related to specific materials, methods and services will be addressed at the conclusion of this presentation. This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without the written permission of the producer is prohibited TEX COTE Textured Coatings of America, Inc. All Rights Reserved.

2 Objectives Overview What It Can Do IR Heat Reflective Coating Features Development of IR Heat Reflective Coatings Origins of IR Heat Reflective Coatings Proof of Performance Field Test Results Description of System Tests Reflectivity Results Energy Savings Results Technology and Thermal Properties Dark Vs. Light Colors Materials and Heat Absorption Reflectivity and Emissivity Total Solar Reflectance Total Solar Absorption The Light Spectrum Infrared Photography LEED Credit LEED Overview LEED Programs Available How It Works How IR Heat Reflective Coatings Contribute Benefits Green Building initiatives Aesthetic and Style Choices Energy Savings Superior Fade Resistance Durability Environmental Benefits Objective

3 Welcome Infrared (IR) heat reflective coating systems for the exterior walls of a structure are an important technological breakthrough, offering new advantages and opportunities in both residential and commercial applications. This program will provide an overview of this innovative coating technology, as well as an update on key code requirements and energysaving standards. Welcome

4 Chapter 1: Overview Page 1: What It Can Do What It Can Do Compared to paint and non-reflective coatings, IR heat reflective coatings can Greatly reduce the amount of heat that is absorbed and retained by a building s exterior wall surfaces. Lower exterior wall temperatures by as much as 40 degrees when compared to non-reflective coatings and paints in many colors. Provide a passive cooling technique that yields energy savings and carbon reductions. Reduce the energy required to cool a building by as much as 21.9%. (Percentage of savings are based on DOE study which showed savings ranging from %)* Reduce the urban heat island effect, which contributes to urban smog and causes increased demands on power plants. Reduce building fatigue by reducing expansion and contraction due to heating and cooling cycles. Help prevent colors from fading due to UV light exposure. *Percentage of cooling costs and temperature reductions will vary based on color chosen, geographical location, climate condition, and substrate type. In some climates there may be a heating penalty. For more information, visit

5 IR Heat Reflective Coating Features Aesthetic Appeal: Offers greater design flexibility through use of dark colors. Energy Savings: Significantly reduces exterior wall temperatures while helping reduce energy consumption. Durability: Prevents moisture penetration, reduces the effects of building fatigue caused by expansion and contraction and effectively extends the life cycle of existing building stock. Fade Resistance: Provides superior resistance to fading as compared to conventional paints even in dark colors. Reduced Environmental Impact: Exterior coating is formulated with Low Volatile Organic Compounds (VOC) that meet requirements of green building rating systems such as LEED even as an exterior applied coating. Chapter 1: Overview Page 2: IR Heat Reflective Coating Features

6 Development of IR Heat Reflective Coatings Advanced IR coatings technology is unique to other technologies of the past. These coatings are Designed to change the infrared or invisible portion of the light spectrum, helping to reflect heat. Therefore reducing heat absorption, even in dark colors. Designed to diffuse heat evenly across the wall surface. Tested over a nearly two-year period by the Department of Energy (Oak Ridge National Laboratory) and proven to lower energy use. Works without the use of ceramic spheres or other non-proven technologies. Chapter 1: Overview Page 3: Development of IR Heat Reflective Coatings

7 Origins of IR Heat Reflective Coatings Origins of IR heat reflective pigments U.S. Military STEALTH program diffuses heat to eliminate radar detection. Cool roof metal roofing also contain similar heat diffusing pigment technology to prevent heat absorption and lower interior room temperatures. Chapter 1: Overview Page 4: Origins of IR Heat Reflective Coatings

8 Dark Colors Vs. Light Colors Anyone who has ever owned a dark colored car in the summertime knows that dark colors absorb more heat from the sun than light colors. That s because a color like black reflects less of the sun s energy than the color white. In fact, black only reflects about 5% of the sun s energy. IR heat reflective coatings allow even dark colors to act like light colors, reflecting much of the sun s radiant energy an important advantage to designers, builders and building owners concerned about rising energy costs and global warming. Chapter 2: Technology and Thermal Properties Page 1: Dark Vs. Light Colors

9 Materials and Heat Absorption On a hot day, exterior walls can absorb as much as 90% of the radiant energy. Even white walls can absorb significant solar radiation. The wall s absorption of radiant energy makes the inside of the structure hotter and creates greater demand on HVAC systems, thus contributing to carbon emissions. Tests show that advanced infrared heat reflective coatings are on average 100% more reflective than ordinary paint, even in darker colors. When less heat enters a structure, less energy is required to cool its interior. Chapter 2: Technology and Thermal Properties Page 2: Materials and Heat Absorption

10 Reflectivity and Emissivity There are two considerations when looking at the energy efficiency of a surface. They include reflectivity and emissivity. Reflectivity is a measure of how well a material rejects solar energy. Emissivity refers to the degree that the material holds that energy. Chapter 2: Technology and Thermal Properties Page 3: Reflectivity and Emissivity

11 Total Solar Reflectance Definition: The ratio of total solar radiation which is reflected outward by the surface to the amount of total solar radiation falling on the surface. Except in white, traditional paint colors provide limited heat reflective properties. IR heat reflective coatings enable high reflectance, even in dark colors. In fact, IR heat reflective coatings are on average 100% more reflective than traditional paints and coatings in the same color. Chapter 2: Technology and Thermal Properties Page 4: Total Solar Reflectance

12 Total Solar Absorption Definition: The ratio of the amount of total solar radiation absorbed by the surface to the amount of total solar energy falling on the surface. Solar absorption is that portion of total solar radiation neither transmitted nor reflected. Because more solar radiation is reflected by IR heat reflective coatings, its emittance value is higher. When less energy is absorbed, the amount of heat entering the interior of a structure is reduced. This reduction in heat means a reduction in the use of HVAC systems to cool the interior. According to the Department of Energy, IR heat reflective coatings can save up to 21.9% (Percentage of savings are based on DOE study which showed savings ranging from %)* of cooling energy depending upon location, substrate and color. Chapter 2: Technology and Thermal Properties Page 5: Total Solar Absorption *Percentage of cooling costs and temperature reductions will vary based on color chosen, geographical location, climate condition, and substrate type. In some climates there may be a heating penalty. For more information, visit

13 The Light Spectrum Much of the light spectrum consists of visible light the light we can actually see. But a large portion of it is invisible to the eye the near infrared light. IR heat reflective coatings reduce the effect of this largest portion of the light spectrum. By making this portion of the light spectrum highly reflective, darker colors can perform much like lighter colors. Chapter 2: Technology and Thermal Properties Page 6: The Light Spectrum

14 Infrared Photography Infrared photography proves that IR heat reflective coatings provide greater heat reflectivity than traditional paints. In fact, IR heat reflective coatings can reduce a wall s surface temperature by nearly 40 degrees when compared to traditional paints in the same color. Chapter 2: Technology and Thermal Properties Page 7: Infrared Photography

15 Green Building Initiatives Two events are converging to create the most significant crisis of modern time the warming of the earth s atmosphere by burning fossil fuels, and the rapid depletion of global petroleum and natural gas reserves. Sustainable design and green building initiatives have gained recent attention because of these events. Some of the building-related initiatives designed to help reduce the impact of these events can be found by clicking the links below: EPA s High Performance Building programs Collaborative for High Performance Schools ( Sustainable Buildings Industry Council s ( Building Green Guidelines And these are only a few of the programs. US Green Building Council s LEED rating system ( IR heat reflective coatings can play an important role in helping reduce the amount of fossil fuels used to cool homes and buildings, and can provide other benefits as well. Chapter 3: Benefits of Heat Reflective Coatings Page 1: Green Building Initiatives

16 Aesthetic and Style Choices IR heat reflective coatings offer a wide range of design choices: Broad range of heat reflective colors including medium and dark colors. Wide selection of trim colors Choice of textured and smooth finishes. Chapter 3: Benefits of Heat Reflective Coatings Page 2: Aesthetic and Style Choices

17 Energy Savings Depending on the climate zone, substrate & other conditions in which a building is located, heat reflective coatings can make a significant contribution to reduce energy use & lower cooling costs. Heat reflective coatings can: Lower exterior wall temperatures by as much as 40 degrees when compared to traditional paints in many colors. Reduce energy costs related to cooling by up to 21.9%. (Percentage of savings are based on DOE study which showed savings ranging from %)* Create less heat buildup around the building (heat island effect) that can raise interior temperatures. *Percentage of cooling costs and temperature reductions will vary based on color chosen, geographical location, climate condition, and substrate type. In some climates there may be a heating penalty. For more information, visit Chapter 3: Benefits of Heat Reflective Coatings Page 3: Energy Savings

18 Superior Fade Resistance The reflective qualities of these coatings lower surface temperatures and reduce fading even in darker colors. This fade resistance feature provides longer life cycle performance and is ideal for project extended life strategies. IR Heat Reflective coatings undergo extensive testing for fade resistance. Every 1000 hours of testing is equivalent to approximately one and a half years of exposure 5000 hours is equivalent to 8-10 years. Chapter 3: Benefits of Heat Reflective Coatings Page 4: Superior Fade Resistance

19 Durability Most building materials, including wall surfaces and substrates, are prone to expansion and contraction due to natural heating and cooling. Excessive heat absorption can exacerbate this natural expansion and contraction, placing stress on the substrate and causing building fatigue. Because of the high reflectance properties of these coatings, the amount of heat absorbed by the substrate is greatly reduced. The result: Less expansion and contraction Less stress placed on the substrate Increased life cycle performance And since heat reflective coatings don t deteriorate like paint, they can cost much less to maintain over the life of the building. Chapter 3: Benefits of Heat Reflective Coatings Page 5: Durability

20 Environmental Benefits Energy Savings: Heat reflective coatings reduce the amount of heat entering the interior space of a building, which means less energy is required for cooling. Conservation of Resources: No impact on landfill is realized Air Quality: The highly reflective coating systems reduce the urban heat island effect. The result is improved air quality and lower levels of urban smog as well as decreased demand on electrical utilities power plants, most of which burn fossil fuels to generate electricity. This image, captured with both satellite and thermal imaging, shows the increase of heat around the city of Atlanta over 21 years. IR heat reflective coatings can help change the urban footprint by reducing the heat island effect commonly found in urban areas. This chart shows how the heat island effect has grown within the city of Atlanta since Chapter 3: Benefits of Heat Reflective Coatings Page 6: Environmental Benefits

21 Description of System Tests Oak Ridge National Laboratory monitored energy savings in two residential homes. One was located in Phoenix, AZ and the other in Jacksonville, FL. The substrate on the home in Arizona was stucco. The substrate on the home in Florida was wood. Heat sensors were attached on both the exteriors and interiors of the homes. The reflective properties and thermal performance between paint and heat reflective coatings were studied. Phoenix, AZ In addition, a test site was set up at the Oak Ridge National Laboratory where a stucco test panel was studied. Chapter 4: Proof of Performance Page 2: Description of System Tests Jacksonville, FL

22 Reflectivity Results Results of the test wall from each site showed that on average heat reflective coatings were 100% more reflective than non-reflective systems. Independent testing also confirmed similar results for Big Box structures. Chapter 4: Proof of Performance Page 3: Reflectivity Results

23 Energy Savings Results Energy savings were calculated from results obtained through the Department of Energy study. The energy savings were based on an 1100 sq. ft. house. The results show that heat reflective coatings: result in lower energy use than conventional paints reduce carbon emissions into the atmosphere save up to 21.9% on cooling costs (percentage of savings are based on DOE study which showed savings ranging from %)* An independent study confirmed similar results on Big Box structures. (Percentage of savings are based on the Architectural Energy Corporation study which showed savings ranging from %)*. *Percentage of cooling costs and surface temperature reductions will vary based on color chosen, geographical location, climate conditions, and substrate type. In some climates there may be a heating penalty. For more information visit Chapter 4: Proof of Performance Page 4: Energy Savings Results

24 LEED Overview LEED (Leadership in Energy & Environmental Design) is a voluntary, consensus-based green building specification introduced by the US Green Building Council in In recent years, LEED qualification has gained increasing popularity as a required standard for new construction contracts for government buildings. January 2006 White House Summit on Federal Sustainable Buildings: LEED memorandum of understanding signed by 17 federal agencies, representing 75% of government s 500,000 buildings 3.4 billion square feet of space Recent Uses of LEED : Department of Defense: 254 of 867 projects in 2005 General Services Administration: LEED Silver qualification required for all new construction NASA: LEED Silver required for all projects over $500,000 Department of the Interior: LEED Silver required for Department of Indian Affairs school projects Chapter 5: LEED Credit Page 1: Overview

25 Programs Available IR heat reflective coatings can help LEED projects qualify for various credits. These products can be specified individually or together as part of an overall green building system. The LEED programs currently available include: LEED -NC: New commercial construction and major renovation projects LEED -EB: Existing building operations LEED -CI: Commercial interiors projects LEED -CS: Core and shell projects LEED -H: Homes LEED -ND: Neighborhood development LEED Application Guides: Retail ( currently in pilot), Multiple Buildings/Campuses, Schools, Healthcare, Laboratories, Lodging Chapter 5: LEED Credit Page 2: Programs Available

26 How It Works LEED provides a complete framework for assessing building performance and meeting sustainability goals. Based on a system of prerequisites and credits, LEED projects earn points during the certification process and then are awarded one of the four certification levels: Certified, Silver, Gold, and Platinum. Chapter 5: LEED Credit Page 3: How It Works

27 IR Heat Reflective Coatings Contribute IR heat reflective coatings may contribute to as many as three of the six LEED categories including: Chapter 5: LEED Credit Page 4: IR Heat Reflective Coatings Contribute

28 Thank You For Your Time! Questions? This concludes the American Institute of Architects Continuing Education Systems Program. If you have any questions regarding this module contact: Textured Coatings of America: Continuing Education Services TEX COTE Textured Coatings of America, Inc. All Rights Reserved.